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Moment due to Linearly Varying Pressure Aug 2023

  • khoitsma
  • Calculus, Engineering, Excel, Mathematics, Python, PyXLL, Sympy
  • 0 Comments

I built a new function in Python and PyXLL

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Galleries Aug 2023

  • khoitsma
  • Blog Navigation
  • 0 Comments

I added this post as a convenient link to my gallery pages.

  • General
  • Antarctica
  • Seismology
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Small Ideas — Large Effects Aug 2023

  • khoitsma
  • Concept, Engineering, General, History, Mathematics, Science, Software
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Six Mechanical Powers

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Instant Access to all Posts

  • khoitsma
  • General, List, Personal
  • 0 Comments

Tabular list of all posts

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Online Embedded Excel Aug 2023

  • khoitsma
  • Dash by Plotly, Engineering, Excel, iPad_iPhone, Petrochemical Design, Python, pythonanywhere
  • 0 Comments

I built a new app on the web — accessible from any device — desktop, phone, iPad

· Grating calculations

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Filter a Pandas Dataframe using PyXLL (with video) Jul 2023

  • khoitsma
  • AISC, Concept, Engineering, Excel, Python, PyXLL, Video
  • 0 Comments

The function uses only three parameters: the criteria range, the reverse sort toggle, and the upper limit on rows of results.

Note that conditional formatting is applied using the PyXLL formatter option.

lookup

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  • Bow Out Aug 2025
  • Automated Foundation Rebar Drawing Aug 2025
  • Close Encounters in Batting Averages July 2025
  • 2D Engineering Interpolation Jun 2025
  • Lessons Learned (structural engineering) Apr 2025

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Short Takes
My Dash apps

My GeoGebra app
What is the most general equation for the area of a triangle?
The Wait calculation
The incessant obsolescence postulate (IOP)
Barnard’s Star and the 'Wait Equation'
IOP counterargument
The amazing arbelos (only good on a real desktop)
Surprises found in the arbelos (1954)
Arbelos from Wolfram MathWorld
Circle Theorems
• Circle Theorems Marked
• Circle Theorems — Practice
Two Semicircles
Japanese temple geometry
★ Sister Celine — a beautiful life
★ John Lienhard IV on Ingenuity
★ Charles Stutzenbaker, Field Biologist
Neal Stephenson on the OS
A few quotations

Tyler TX weather • 🌡 Steve Fitzgerald
Tyler TX weather • 3-day history
Tyler TX weather • calendar month
Tyler TX weather • graph month
East Texas weather • TAMU
★ All of the water in the world

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Diaorifa
  • Home
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Pentagonal number visual proof

Dice Distribution (bar)

Bayes theorem visual proof

Bayes icon